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  • Title: One-step hydrothermal creation of hierarchical microstructures toward superhydrophilic and superhydrophobic surfaces.
    Author: Liu X, He J.
    Journal: Langmuir; 2009 Oct 06; 25(19):11822-6. PubMed ID: 19788228.
    Abstract:
    This article describes a simple and convenient method to fabricate hierarchically structured coatings on glass substrates from soda lime glass by one-step hydrothermal method. The surfaces of the coatings are rough and are composed of flower-like particles assembled by nanoflakes or urchin-like particles constructed by nanowires. These rough surfaces exhibit superhydrophilicity, their water contact angles reaching 0 degrees in less than 40 ms. After surface modification by 1H,1H,2H,2H-perfluorooctyltriethoxysilane, the wetting properties of these coatings switch from superhydrophilicity to superhydrophobicity, with water contact angles as high as 160 degrees and slide angle as low as 1 degrees . The formation mechanism of the hierarchically structured coatings is discussed in detail on the basis of experimental results.
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